[...] city officials complain newly arriving Guatemalan children are straining classroom resources, and the mayor and school superintendent have faced criticism for suggesting adult immigrants are posing as teens to attend school. The surge of unaccompanied minors crossing the border illegally has breathed new life into what has been a long-simmering controversy in Lynn, and the debate is happening in communities around the country as residents and local officials are faced with providing services for the children. In Michigan, a social service organization's plan to house child immigrants from Central America in the town of Vassar has prompted multiple demonstrations, which have extracted a toll on the community of about 2,600 about 70 miles northwest of Detroit, said Vassar City Manager Brad Barrett. Immigrant advocates, though, complain the mayor has been more interested in finding a scapegoat for the city's budget challenges than real solutions to the district's growing student population, which also includes resettled refugees and immigrants from other continents. [...] it's not something that can stop you from achieving what you want. Besides Lynn, immigrant advocates in New Bedford in southern Massachusetts and Chelsea, another Boston-area city, have reported a steady stream of school-age immigrants from Central America.